WO2000018490A1 - Procede et dispositif pour enlever des particules contenues dans un fluide - Google Patents

Procede et dispositif pour enlever des particules contenues dans un fluide Download PDF

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Publication number
WO2000018490A1
WO2000018490A1 PCT/EP1999/007167 EP9907167W WO0018490A1 WO 2000018490 A1 WO2000018490 A1 WO 2000018490A1 EP 9907167 W EP9907167 W EP 9907167W WO 0018490 A1 WO0018490 A1 WO 0018490A1
Authority
WO
WIPO (PCT)
Prior art keywords
particles
filter
fluid
outlet
vehicle
Prior art date
Application number
PCT/EP1999/007167
Other languages
German (de)
English (en)
Inventor
Günther Alexander REVERCHON
Original Assignee
Lundin Filter Gmbh
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Lundin Filter Gmbh filed Critical Lundin Filter Gmbh
Publication of WO2000018490A1 publication Critical patent/WO2000018490A1/fr

Links

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D46/00—Filters or filtering processes specially modified for separating dispersed particles from gases or vapours
    • B01D46/24—Particle separators, e.g. dust precipitators, using rigid hollow filter bodies
    • B01D46/2403—Particle separators, e.g. dust precipitators, using rigid hollow filter bodies characterised by the physical shape or structure of the filtering element
    • B01D46/2411—Filter cartridges
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D33/00—Filters with filtering elements which move during the filtering operation
    • B01D33/06—Filters with filtering elements which move during the filtering operation with rotary cylindrical filtering surfaces, e.g. hollow drums
    • B01D33/073—Filters with filtering elements which move during the filtering operation with rotary cylindrical filtering surfaces, e.g. hollow drums arranged for inward flow filtration
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D33/00—Filters with filtering elements which move during the filtering operation
    • B01D33/44—Regenerating the filter material in the filter
    • B01D33/52—Regenerating the filter material in the filter by forces created by movement of the filter element
    • B01D33/56—Regenerating the filter material in the filter by forces created by movement of the filter element involving centrifugal force
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D33/00—Filters with filtering elements which move during the filtering operation
    • B01D33/70—Filters with filtering elements which move during the filtering operation having feed or discharge devices
    • B01D33/72—Filters with filtering elements which move during the filtering operation having feed or discharge devices for feeding
    • B01D33/727—Filters with filtering elements which move during the filtering operation having feed or discharge devices for feeding provoking a tangential stream
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D33/00—Filters with filtering elements which move during the filtering operation
    • B01D33/80—Accessories
    • B01D33/804—Accessories integrally combined with devices for controlling the filtration
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D46/00—Filters or filtering processes specially modified for separating dispersed particles from gases or vapours
    • B01D46/0052—Filters or filtering processes specially modified for separating dispersed particles from gases or vapours with filtering elements moving during filtering operation
    • B01D46/0056—Filters or filtering processes specially modified for separating dispersed particles from gases or vapours with filtering elements moving during filtering operation with rotational movement
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D50/00—Combinations of methods or devices for separating particles from gases or vapours
    • B01D50/20—Combinations of devices covered by groups B01D45/00 and B01D46/00
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D2201/00—Details relating to filtering apparatus
    • B01D2201/28—Position of the filtering element
    • B01D2201/287—Filtering elements with a vertical or inclined rotation or symmetry axis

Definitions

  • the invention relates to an apparatus and a method for separating particles from a fluid.
  • the invention relates to a method and a device which can be operated over a very long period of time without interruption or without phases of reduced effectiveness.
  • a common method particles from a fluid, i.e. to separate a gas or a liquid is the filtration.
  • the particle-laden fluid is passed through a filter and the particles remain on the filter as the fluid passes through the filter.
  • the particles clog the filter more and more until the filter clogs.
  • the filter In order to continue the filtration process, the filter must either be replaced or cleaned. Filtration processes of this type, in which particles are deposited on the filter, cannot therefore be carried out continuously or without phases of reduced effectiveness.
  • An alternative method of separating particles from a fluid uses the principle of a centrifuge. This separation process is particularly suitable for separation of particles from a gas stream.
  • a device operating according to this separation principle usually consists of a hollow cylindrical housing, which runs in a funnel shape in its lower region.
  • a rotor is arranged in the cylindrical part of the housing, which rotor usually has a plurality of rotor blades pointing radially outwards from the axis of rotation, which extend up to the inner wall of the housing.
  • the rotor is set in motion and creates an artificial gravitational force field.
  • the particle-laden gas flow fed to the centrifuge device is strongly accelerated in the direction of rotation along the housing wall.
  • the particles which are heavier than the gas, are pressed against the housing wall by the gravitational force field, braked there and sink down on the housing wall into the funnel-shaped area of the device, from where they are drawn off.
  • the cleaned gas is removed in the area of the axis of rotation above the rotor.
  • the separators which operate on the principle of a centrifuge, are relatively well suited for separating large particles, but not for small particles in the sub-millimeter diameter range. In order to be able to separate such small particles at all, a very high gravitational force is required, the separation time is extremely long, and even small disturbances in the flow conditions of the centrifuge make it practically impossible to separate these particles.
  • a device which is also suitable for separating very small particles from a fluid is described in DE 195 21 963 C1.
  • This device is similar in structure to the centrifuge filtration devices, however the separation process is based on a fundamentally different principle. zip.
  • a rotating filter is used, the separating effect of which is not based on the fact that a gravitational force field is artificially generated, but on the fact that particles that enter the area of the filter collide with the filter surface and are knocked off the filter.
  • the fluid freed from the particles passes through the filter surface and is drawn off from the inside of the filter.
  • the distance between the filter surface and the inside wall of the housing can be much larger than the distance between the rotor blades and Inner wall of the centrifuge devices.
  • the filters used there also differ in terms of their surface structure from the rotors usually used in centrifuge devices.
  • the outer surfaces of the filters will be more self-contained.
  • Filters preferred in DE '963 are those with a hollow cylindrical shape, in which the cylinder jacket is formed, for example, by a porous body, a grid or by rods running parallel to the longitudinal axis of the filter.
  • the openings in the filter surfaces of these filters are usually much larger than the particles to be separated. However, it is still possible to separate very small particles if the filters are rotated sufficiently quickly.
  • the object of the invention is to provide a method and a device for separating particles from a fluid, which can be operated continuously over a very long period of time and without phases of reduced effectiveness. Even very small particles, in particular those with a particle diameter of less than 2 ⁇ m, should be practically completely separable from the fluid.
  • the device should be able to be operated practically without maintenance over a very long period of time. In particular, it should not be necessary to replace or clean the filter.
  • the method and device should also be particularly suitable for the ventilation of interior spaces, here in particular vehicle interiors, with cleaned air. Another aspect of the invention is to facilitate the disposal of the particles separated from the fluid.
  • the invention therefore relates to a device for separating particles from a fluid.
  • the device comprises a housing with an inlet for the particle-laden fluid which is supplied to the device from a first space.
  • a self-cleaning filter which separates fluid and particles from one another is arranged in the device.
  • a self-cleaning filter is to be understood here as a filter that does not have to be cleaned in the course of the separation process.
  • the filter is so designed that the particles are not blocked by deposits and their function is hindered. It is particularly preferably a Filter on which practically no particles are deposited during operation, or it is at least designed in such a way that deposited particles are thrown off the filter again after a very short time and thus practically do not impair the separating action of the filter.
  • the device according to the invention also has an outlet for the fluid substantially freed from the particles, which opens out from the device into a second space which is separate from the first space. There is also another outlet for separated particles. According to the invention, this outlet is designed in such a way that, when the device is in operation, a vacuum is generated in its area and the separated particles are returned to the first space.
  • the device according to the invention can either use the principle of a centrifuge or the principle described in DE 195 21 963 C1, in which the particles collide with the surface of the filter, pushed away from the filter and thus at the passage into the interior of the filter can be prevented.
  • the device according to the invention can in principle be constructed in accordance with the known centrifuge separation devices.
  • the self-cleaning filter is then a suitable rotor of a centrifuge.
  • the device according to the invention has the advantage over the known devices that even very small particles, ie also particles with a diameter of well below 2 ⁇ and up to a particle size of 0.1 ⁇ m can be almost completely separated from the fluid.
  • the measure according to the invention of generating a negative pressure at the outlet for separated particles that is to say reducing the pressure in the area of the particle outlet in this way like that it is lower than in the device and the first space to which the particles are supplied, this is effectively prevented. Even small particles can be removed practically completely from the fluid and the separation device.
  • the outlet for separated particles is designed such that the particles are returned to the first space from which the particle-laden fluid was fed to the device. This measure avoids the disposal problems that usually arise for the separated particles.
  • the configuration of the device according to the invention is particularly advantageous if it is used to supply cleaned air to interiors. Instead of collecting the separated particles - for example pollen, dust and soot particles - in the interior and disposing of them from time to time, the particles are returned directly to where they come from - namely to the ambient air.
  • a throttle is arranged in the area of the particle outlet, with which the vacuum can be controlled in a targeted manner.
  • the throttle can basically be placed anywhere on the particle outlet between the housing and the lower be arranged pressure source.
  • the throttle can be set so that a constant negative pressure is maintained over the entire period of the separation process.
  • the strength of the negative pressure suitably depends on the construction and size of the device and on the type and size of the particles which are to be separated from the fluid. Optimal pressure conditions, which do not impair the effectiveness of the separation within the device and prevent the penetration of particles into the cleaned fluid, can easily be found out by simple experiments.
  • the negative pressure in the area of the particle outlet is generated with a pump.
  • This variant is particularly suitable when the device according to the invention is used to ventilate the interior of a building.
  • the air to be cleaned is sucked in from the outside of the building, freed from dirt particles in the device according to the invention and conducted into the interior as clean air.
  • the separated particles are returned to the outside of the building through the particle outlet pressurized by the pump.
  • the special design of the device according to the invention even allows the smallest particles down to a particle diameter of about 0.1 ⁇ m to be separated and thus even prevents pollen from penetrating into the interior.
  • the device according to the invention is used for cleaning air with which a vehicle is ventilated.
  • the device according to the invention can in principle be used in any type of vehicle, but use in automobiles and railroad cars is particularly preferred.
  • the device according to the invention is integrated into the ventilation system of the vehicle.
  • the air to be cleaned is passed from the vehicle environment via the ventilation system into the device according to the invention, where it is separated from the self-cleaning filter into clean air and dirt particles, and the cleaned air is conducted into the interior of the vehicle.
  • the particle outlet through which the separated particles are returned to the outside into the vehicle environment is particularly preferably designed such that the negative pressure is generated by the movement of the vehicle.
  • the particle outlet is therefore expediently guided to the outside of the vehicle in such a way that the wind blows past the end of the outlet when the vehicle is moving. This creates a negative pressure in the particle outlet, with which the separated particles are sucked outwards and supplied to the vehicle surroundings.
  • the pressure can also be regulated here with the aid of a throttle.
  • the device according to the invention particularly preferably uses the principle described in DE 195 21 963 C1.
  • the self-cleaning filter of the device according to the invention is then a rotatably mounted filter, the separating effect of which is based on particles entering the area of the filter being hit by the filter surface of the filter and knocked away from there without being deposited on the filter surface.
  • the fluid substantially freed from the particles passes through the filter and is drawn off from the interior of the filter.
  • all rotating filters described in DE '963 can also be used in the device according to the invention.
  • the filter preferably has an essentially hollow cylindrical shape. Because of their simple structure and good separating action, filters are preferred whose filter surface is formed by a grid, by a perforated cylinder surface or by rods running essentially parallel to one another and parallel to the axis of rotation of the filter.
  • the rotating filter is set in motion with the aid of a suitable drive, for example a motor.
  • a suitable drive for example a motor.
  • the speed at which the filter surface on which the particles bounce off is of particular importance for the invention. Particularly good separation effects can be achieved if the peripheral speed of the filter surface is at least 60 meters per second.
  • the peripheral speed depends on the one hand on the type of particles to be separated and on the other hand on the design of the filter itself. Basically, the peripheral speed of the filter surface should be higher, the larger the openings in the filter surface and the smaller the particles to be separated.
  • the filter can basically be provided with its own rotary drive
  • the fan drive the drive for the fan of the vehicle ventilation system
  • the fan drive the drive for the fan of the vehicle ventilation system
  • negative pressure is applied to only one particle outlet, this is expediently the outlet which serves to remove lighter particles.
  • This outlet is then preferably closer to the filter than the outlet for the heavier particles.
  • the latter outlet for heavier particles is then expediently arranged in the lower region of the device. Often there is no problem with these heavier particles that they are whirled up again by the currents within the housing and conveyed back towards the filter. The application of negative pressure in this area is then not absolutely necessary, but can also promote the removal of the heavier particles from the device.
  • Figure 1 shows a device according to the invention in longitudinal section.
  • FIG. 2 shows a further device according to the invention in longitudinal section
  • Fig. 3 shows a cross section through the device of FIG. 1 along the line A-A and
  • FIG. 3 shows a sectional view of an example of a device 1 according to the invention.
  • a filter 9 is arranged in an essentially cylindrical housing 2, which converges in a funnel shape in the lower region, in the region of the cylinder longitudinal axis.
  • the filter 9 is sealed with seals 11 on the top and bottom.
  • the filter is rotatably mounted, and below the filter is the drive device with a motor 12, which rotates the filter counterclockwise, according to the arrow R.
  • An outlet 5 leads out of the housing 2 from the top of the filter.
  • the outlet 5 is hermetically sealed against the surrounding housing interior.
  • Another outlet 7 is arranged in the lower region, at the pointed end of the housing 2, and is separated from the interior of the housing by a throttle 13.
  • In the upper region of the device 1 there is an inlet 3, through which the fluid laden with particles, as indicated by the hatched arrow 4, is introduced into the interior of the device.
  • the particle-laden air 4 is blown into the device 1 tangentially and in the direction of rotation R along the housing wall.
  • Some of the heavier particles sink from the circulating air flow directly into the funnel-shaped area of the housing 2 and in the direction of the throttle 13 and outlet 7 downwards (arrow b).
  • the remaining part of the particles and in particular the lighter particles are guided with the air flow in the direction of the filter 9, which rotates at a very high speed.
  • the peripheral speed of the filter surface 10 is usually 60 m / s or more. As soon as the particles reach the area of the filter 9, they collide with the surface 10 of the filter and become from the filter beaten away to the outside.
  • the outlet 5 for the cleaned air leads into the interior of the vehicle, while the inlet 3 with the exterior of the vehicle, the vehicle surroundings , communicates. Then the outlet 7, with which the particles 8 separated from the air are removed from the device 1, also leads to the outside of the vehicle.
  • no pump is provided in the area of the outlet 7, with which vacuum is generated.
  • the negative pressure arises here in that the end of the outlet 7 facing away from the device is connected to the vehicle exterior in such a way that the wind blowing past the end of the outlet 7 creates a negative pressure in the outlet and thus the separated particles 8 the device 1 sucks.
  • FIG. 2 shows a further device according to the invention, in which the same reference numerals designate the same parts as in FIG. 1.
  • this device has two outlets 7 and 7 '. At both outlets, a negative pressure is generated, here - with the help of pumps 14.
  • throttles can be used in an alternative embodiment in addition to the pumps.
  • the use of pumps to generate the negative pressure in the area of the outlets for the separated particles is particularly useful when non-moving rooms are to be ventilated, for example, interiors of buildings.
  • lighter particles are predominantly drawn off in the lower outlet 7 'and, due to their higher mass, sink more rapidly into the lower region of the filtration device.
  • FIG. 3 shows a cross section along the line 2-2 in FIG. 1.
  • This figure illustrates the structure of the rotating filter 9.
  • the filter has an essentially hollow cylindrical shape with closed end faces, the outlet 5 for the cleaned air being led out of the upper end face.
  • the filter surface, the cylinder jacket, is formed by a multiplicity of rods 15 which are arranged parallel to one another and parallel to the axis of rotation of the filter.
  • the separation of the particle-laden air stream 4 into purified air and particles 8 is now based on the fact that the particles which reach the area of the filter 9 collide with the rapidly rotating rods 15 of the filter and are knocked away from the rods. Air freed from the particles 8, on the other hand, penetrates through the spaces between the rods 15 into the interior of the filter 9 and is drawn off from here.
  • the separating effect is further improved by the fact that very small particles collide with one another in the areas behind the bars in which the swirls W form, agglomerate and thus form larger particle assemblies. Due to their increased mass, a higher centrifugal force acts on these particle assemblies, which means that these particle agglomerates move better away from the filter. Even the smallest particles down to particle sizes of around 0.1 ⁇ m can therefore be separated extremely effectively from the fluid to be cleaned.

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  • Chemical & Material Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Physics & Mathematics (AREA)
  • Geometry (AREA)
  • Filtering Of Dispersed Particles In Gases (AREA)
  • Separating Particles In Gases By Inertia (AREA)

Abstract

L'invention concerne un procédé et un dispositif permettant d'enlever des particules contenues dans un fluide. Le dispositif comprend un filtre autonettoyant qui sépare les particules du fluide. Le fluide purifié et les particules séparées sont extraits du dispositif par des sorties séparées. Selon l'invention, la sortie prévue pour les particules séparées se présente de manière que lorsque le dispositif est en marche, il se produise une dépression dans la zone de ladite sortie, et que les particules séparées soient renvoyées dans l'espace d'où le fluide à purifier a été acheminé jusqu'au dispositif. Dans une variante préférée, l'invention s'utilise pour purifier de l'air de ventilation dans un véhicule. La dépression intervenant dans la zone de la sortie prévue pour les particules est produite par le mouvement du véhicule.
PCT/EP1999/007167 1998-09-28 1999-09-27 Procede et dispositif pour enlever des particules contenues dans un fluide WO2000018490A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE19844441.9 1998-09-28
DE19844441A DE19844441A1 (de) 1998-09-28 1998-09-28 Vorrichtung und Verfahren zum Abtrennen von Teilchen aus einem Fluid

Publications (1)

Publication Number Publication Date
WO2000018490A1 true WO2000018490A1 (fr) 2000-04-06

Family

ID=7882519

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/EP1999/007167 WO2000018490A1 (fr) 1998-09-28 1999-09-27 Procede et dispositif pour enlever des particules contenues dans un fluide

Country Status (2)

Country Link
DE (1) DE19844441A1 (fr)
WO (1) WO2000018490A1 (fr)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2006045138A2 (fr) * 2004-10-29 2006-05-04 Johnson Leslie Vincent P Extracteur de poussiere
CN108410507A (zh) * 2018-04-20 2018-08-17 中国科学院工程热物理研究所 旋风分离器及预热式气化系统
WO2019056229A1 (fr) * 2017-09-20 2019-03-28 龚金凤 Dispositif d'épuration d'air et d'élimination de poussière respectueux de l'environnement et auto-nettoyant
CN116272119A (zh) * 2023-05-24 2023-06-23 福建省德尚电子材料有限公司 一种光刻胶用高精度过滤设备

Families Citing this family (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20080016833A1 (en) 2006-07-20 2008-01-24 Deere & Company, A Delaware Corporation Air filter with rotating filter element in an agricultural working vehicle
WO2015128514A1 (fr) * 2014-02-27 2015-09-03 Knorr-Bremse España, S.A. Système de filtration auto-nettoyant pour installations de climatisation ferroviaires
DE102019203552B4 (de) * 2019-03-15 2023-11-09 Georg sen. Klaß Filteranordnung nach Art eines Fliehkraftabscheiders mit Turbulenzkörper und deren Verwendung
DE102019203551A1 (de) 2019-03-15 2020-09-17 Georg Klass Filteranordnung nach Art eines Fliehkraftabscheiders
WO2020187653A1 (fr) 2019-03-15 2020-09-24 Georg Klass Ensemble filtre à la manière d'un séparateur centrifuge doté d'un corps de turbulence

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US3877454A (en) * 1971-04-27 1975-04-15 Daimler Benz Ag Air separator
GB1415185A (en) * 1971-12-07 1975-11-26 Int Harvester Co Air filter
DE2802369A1 (de) * 1978-01-20 1979-07-26 Ltg Lufttechnische Gmbh Filtervorrichtung zum filtern von durch staub und faserabfaelle verunreinigter luft
GB2064359A (en) * 1979-11-29 1981-06-17 Locker Air Maze Ltd Air filters
US4469490A (en) * 1982-10-22 1984-09-04 Accessory Sales, Inc. Method and apparatus for cleaning air entering the cab of a vehicle
US4734030A (en) * 1985-01-22 1988-03-29 Lucien Fenaux Apparatus for the treatment of flue gases
FR2642662A1 (fr) * 1989-02-09 1990-08-10 Abg Semca Dispositif et procede de separation des particules solides presentes dans un gaz et appareil comportant un tel dispositif
DE19521963C1 (de) * 1995-06-16 1996-10-24 Lundin Eric G Verfahren zur Ausfiltrierung von Partikeln aus einem Fluid mit Hilfe eines rotierenden Filters

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US760046A (en) * 1903-07-30 1904-05-17 Us Ordnance Co Percussion-fuse.
DE3931033A1 (de) * 1989-03-30 1990-10-04 Bissinger Gmbh Filteranordnung fuer grossbehaelter

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Publication number Priority date Publication date Assignee Title
US3877454A (en) * 1971-04-27 1975-04-15 Daimler Benz Ag Air separator
GB1415185A (en) * 1971-12-07 1975-11-26 Int Harvester Co Air filter
DE2802369A1 (de) * 1978-01-20 1979-07-26 Ltg Lufttechnische Gmbh Filtervorrichtung zum filtern von durch staub und faserabfaelle verunreinigter luft
GB2064359A (en) * 1979-11-29 1981-06-17 Locker Air Maze Ltd Air filters
US4469490A (en) * 1982-10-22 1984-09-04 Accessory Sales, Inc. Method and apparatus for cleaning air entering the cab of a vehicle
US4734030A (en) * 1985-01-22 1988-03-29 Lucien Fenaux Apparatus for the treatment of flue gases
FR2642662A1 (fr) * 1989-02-09 1990-08-10 Abg Semca Dispositif et procede de separation des particules solides presentes dans un gaz et appareil comportant un tel dispositif
DE19521963C1 (de) * 1995-06-16 1996-10-24 Lundin Eric G Verfahren zur Ausfiltrierung von Partikeln aus einem Fluid mit Hilfe eines rotierenden Filters

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2006045138A2 (fr) * 2004-10-29 2006-05-04 Johnson Leslie Vincent P Extracteur de poussiere
WO2006045138A3 (fr) * 2004-10-29 2006-09-28 Johnson Leslie Vincent P Extracteur de poussiere
WO2019056229A1 (fr) * 2017-09-20 2019-03-28 龚金凤 Dispositif d'épuration d'air et d'élimination de poussière respectueux de l'environnement et auto-nettoyant
CN108410507A (zh) * 2018-04-20 2018-08-17 中国科学院工程热物理研究所 旋风分离器及预热式气化系统
CN108410507B (zh) * 2018-04-20 2021-04-09 中国科学院工程热物理研究所 旋风分离器及预热式气化系统
CN116272119A (zh) * 2023-05-24 2023-06-23 福建省德尚电子材料有限公司 一种光刻胶用高精度过滤设备
CN116272119B (zh) * 2023-05-24 2023-08-25 福建省德尚电子材料有限公司 一种光刻胶用高精度过滤设备

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